Improvement in padlocks



of, reference being had to the accompanying drawings 'of the said pins, in finishing the lock, are considerably ,opened and carried away, .or the car entered.

lock so constructed, that it could not be so easily dainstrut @twine JAMES ne. DEW, .orcnIoAed ILLINOIS,

Letters Patent No. 102,661, dated May 3, 1870.

IMPROVEMENT IN PADLOCKS.

The l.''achec'iule referred to :in these Letters Patent and making part of the same.

To all whoni it may concern.-

Beit known that I, JAMES M. A. DEW, of the city of Chicago, in the countyV of Cook and State o f' Illinois, have invented certain new and useful Improvements in Padlocks; and I` do hereby declare that the following is a full, clear, and exact description theremaking part of this specification, and to the letters ot' reference marked thereon, like letters indicating like parts wherever they occur.

To enable ot-hers skilled in the art to construct and use my invention, I will proceed to describe it.

Figure 1 is a perspective view of the case of the lock, without the face-plate;

Figure 2 is the face-plate; and

Figure 3 is a section of the ears and -pins securingV the neck of padlock to the ears.

The ordinary padlocks used for locking freight-cars, switches, 82e., are so constructed that Itheir face-plate is connected with the case of the loclby pins riveted on the back side ofthe lock; but as the riveted ends led away, the result is, that by a slanting blow of a hammer, or even of a stick, against the edge of the face-plate, this plate may be partially detached from the'case, the bolt of the lock shifted back, the lock The object of this invention is to -make the padaged andopened; and

Its nature consists in making the case of the lock, including both ears to which the staple or neck of the lock is secured, cast of one piece of metal, and provided with a flange or rii around the opcning,-into which the face-plate is fitted, over the edges of which the said flange orrimis hammered down, so as to form a perfect rivet all around the face-plate, thereby preventing the possibility of detachin g the face-plate from the case byy a hammer or a stick blow.

The invention consists also -in soarranging the pin washer. p l

" A is the case of thc lock, cast of one piece, with ears B B', and'vprovided with ange or rim a, around an opening, O, iuwhich sets the face orcover-plate G, the edges of which are so beveled on otherwise arranged, that, when the said plate is set in, the flange a, by being'hammered down, or turned over the edges of the said plate, will form a .rivet all around, thereby' securing the plate O to the' case A- so firmly that it cannot be pried o'.

D is a pin, securing the staple or neckE of the lock to the ears B B'. It is provided with a screwthread, S, fitting a female screw-thread cut in the back ear B', into which the said pin is screwed before the washer F is screwed on, and the end of the said pin is riveted over the said washer.

With this a1'1angement,-,any mutilation of the ear B', for the purpose of disengaging the pin, will muti-r lat-e also the screw-threads to such an extent, that it will be impossible for the thief to screw out the pin.

fhat I4 claim as new and my invention, and desire to secure by Letters Patent, is

A padlock case, consisting of the part A, cast complete, with a recess around the inner side of its rim,

and the plate G set therein, and secured by riveting the edge of the rim down upon the plate .all around, substantially as described.

2. The pin D, secured in place by being screwed into the ear of the case, and having a washer riveted upon its outer end, substantially as herein set forth.

` JAMES M. A.' DEW.

'Witnesscsz J. B. Tono-Hm, WILL H. PRICE. Y 

